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JOURNAL ARTICLE
REVIEW
Purinergic P2Y receptors: Molecular diversity and implications for treatment of cardiovascular diseases.
Pharmacology & Therapeutics 2017 December
Purinergic signaling, mediated mainly by G protein-coupled P2Y receptors (P2YRs), is now attracting attention as a new therapeutic target for preventing or treating cardiovascular diseases. Observations using mice with genetically modified P2YRs and/or treated with a pharmacological P2YR inhibitor have helped us understand the physiological and pathological significance of P2YRs in the cardiovascular system. P2YR-mediated biological functions are predominantly activated by mononucleotides released from non-adrenergic, non-cholinergic nerve endings or non-secretory tissues in response to physical stress or cell injury, though recent studies have suggested the occurrence of ligand-independent P2YR function through receptor-receptor interactions (oligomerization) in several biological processes. In this review, we introduce the functions of P2YRs and possible dimerization with G protein-coupled receptors (GPCRs) in the cardiovascular system. We focus especially on the crosstalk between uridine nucleotide-responsive P2Y6 R and angiotensin (Ang) II type1 receptor (AT1R) signaling, and introduce our recent finding that the P2Y6 R antagonist MRS2578 interrupts heterodimerization between P2Y6 R and AT1R, thereby reducing the risk of AT1R-stimulated hypertension in mice. These results strongly suggest that targeting P2Y6 R oligomerization could be an effective new strategy to reduce the risk of cardiovascular diseases.
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